diff --git a/compiler/gen/src/llvm/build.rs b/compiler/gen/src/llvm/build.rs
index 0f74fe6be7..c291ca5d8b 100644
--- a/compiler/gen/src/llvm/build.rs
+++ b/compiler/gen/src/llvm/build.rs
@@ -1306,6 +1306,7 @@ fn list_literal<'a, 'ctx, 'env>(
     )
 }
 
+#[allow(clippy::too_many_arguments)]
 fn invoke_roc_function<'a, 'ctx, 'env>(
     env: &Env<'a, 'ctx, 'env>,
     layout_ids: &mut LayoutIds<'a>,
@@ -4052,8 +4053,7 @@ fn cxa_throw_exception<'a, 'ctx, 'env>(env: &Env<'a, 'ctx, 'env>, info: BasicVal
     call.set_call_convention(C_CALL_CONV);
 }
 
-#[allow(dead_code)]
-fn cxa_rethrow_exception<'a, 'ctx, 'env>(env: &Env<'a, 'ctx, 'env>) {
+fn cxa_rethrow_exception(env: &Env<'_, '_, '_>) {
     let name = "__cxa_rethrow";
 
     let module = env.module;
diff --git a/compiler/mono/src/borrow.rs b/compiler/mono/src/borrow.rs
index a3a10ca015..019a2249c2 100644
--- a/compiler/mono/src/borrow.rs
+++ b/compiler/mono/src/borrow.rs
@@ -400,6 +400,7 @@ impl<'a> BorrowInfState<'a> {
         }
     }
 
+    #[allow(clippy::many_single_char_names)]
     fn preserve_tail_call(&mut self, x: Symbol, v: &Expr<'a>, b: &Stmt<'a>) {
         match (v, b) {
             (
diff --git a/compiler/mono/src/ir.rs b/compiler/mono/src/ir.rs
index a1a62992c2..ea22b52881 100644
--- a/compiler/mono/src/ir.rs
+++ b/compiler/mono/src/ir.rs
@@ -4622,7 +4622,7 @@ fn substitute_in_expr<'a>(
     match expr {
         Literal(_) | FunctionPointer(_, _) | EmptyArray | RuntimeErrorFunction(_) => None,
 
-        Call(call) => substitute_in_call(arena, call, subs).map(|new| Expr::Call(new)),
+        Call(call) => substitute_in_call(arena, call, subs).map(Expr::Call),
 
         Tag {
             tag_layout,